Mining apparatus.



G. C. WILTHEW.

MINING APPARATUS.

APPLICATION FILED JULY 22,1913. nauzww AUG.28,1915.

1,164,900. Patented Dec.21,1915.

2 SHEETS-SHEET l.

lwvzwl o'a Geozyc 6. Milt/20w e. c. WILTHEW.

MINING APPARATUS.

APPLlCATlON FILFD JULY 22,1913. RENEWED AUG. 28, 1915.

1,164,900. Patented Dec.21,1915.

2 SHEETS-SHEET 2.

@fluaMov George 0 MlZZ/ww c LUMBIA PLANOGRAPH co WASHINGTON n c To all whom it may concern: I

e an rricn. 1

MINING APPARATUS.

Specification of Letters 'Patent.

Patented Dec.21,1915.

Application filed. July 22,1913, Serial N0. 780,550. Renewed August28,.1915. SerialNo. 47,891.

Beit known that LGnoRen Mahanoy City, in the county of Schuylkill new and useful Improvementsin Mining and 'State of Pennsylvania, have invented Apparatus, off lwhich the following is a specification. 7 v This invention relatesto mining" appaand illustrating its mode of use.

'ratus, )articularlydesignedfor usein coal inining the object of the invention being to vprofvide a drilling apparatus which is light in weight, capable of being'taken apart and easily transported and handled, and particula'rly'designed for use in heavy pitch work in which drills of ordinary; construction can not conveniently bejemployed A further ob ect of the invention 15 to provide a drill whlch comprises a comar-awa small number of parts, and in which the drill proper is provided with 'com-' of Fig. 2; Figs. 4- and 5 are perspective views of the bracket and bearing member detached. Fig. 6 is a detail view'of the bearing member showing the jawsthrown in open position. Fig. 7 is a detail v1ew of a portion of the drill on an-enlarged scale. Fig. 8 is a detail view of theanchor bar.

provide a drilling apparatus comprlsing a drill 1 terminating at its 'forward end in a drill point 2 and at its rear end in a shank 3. The drill is of the twisted type, and is formed With a continuous spiral surface 4 having continuous transverse threads 5. The shank 3 is adapted tofit within the socket 6 of any suitable type of driving brace or element 7 The drill is adapted to be supported in practice from the bank of coal which is being drilled by an anchor bar 8 having a pointed end 9 to enter a hole drilled in the bank, and provided near its opposite end with an opening 10. The open- C. WVILTHE'W, a citizen of theUnited States, resldlng at threads of said drill;

In carrying my invention into practice, I

ing 10 is adapted to'receive and engage a pin or projection'll on a supporting bracket or yoke 12. The arms of this yoke are provided with openings 13 to receive trunnions 14; on a v bearing member 15. This bearing member comprises upper and lower jawslfiand 17 provided with complemental internally threaded semicircular central portions 18, providing a threaded'socket through which the drill extends and the threads of which are adapted to engage the As shown, the lower jaw 16 of the bearing member is provided with trunnions 14, and

said'jaw is formed atone end with an enlargement or knuckle 19 fitting between spacedearsg20 on the adjacent side of the jaw 17 said enlargement and ears'being perforated for the passage of a pintlepin 21, whereby said jaws are pivotally connected for'opening and closing movements. .At its opposite side the jaw 16 is provided with a lug or projection 22 adapted to pass through an opening 23 in the'adjacent side of the jaw 17, said projection 22 being apertured for the passage of a locking key 24, whereby the jaws may be held closed about the drill or released and opened to permit the bracket and bearing member to be disconnected from the drill. As the anchor bar is detachably connected with the bracket and the drill with the brace ordriving element, it will be apparent that the parts oi the appliance may be at any time conveniently disassem bled to permit the apparatus to be conveniently transported from place to place or packed for storage or shipment. Further- -more, it will be seen that the device comprises a comparatively small number of parts, so that an apparatus which is light in weight, and is yet efficient in construction, may be provided for drilling on heavy pitch work and in places comparatively diflicult of access where large and cumbersome drilling appliances of ordinary construction can not readily, if at all, be used.

In the operation of drilling a bank of coal, a small hole is first formed in the bank by means of a small drill operated by the brace or driving element. This drill is then removed, the anchor bar inserted in the opening thus formed, as shown in Fig. 1, the pin 11 of the supporting bracket 12 fitted in the opening 10, the drill 1 mounted in position upon the bearing member and the brace 7 applied to the shank 3. The drill Will then pivotal connection between thebearing mom-- her and bracket, and operated by the brace or driving connection 7. As the drill is ro'- tated the bit thereof cuts into the bank and the threadsengage the threads of the beardisassembled condition to another point for ing member, whereby the drill is positively fed forward. When the bore is completed, the apparatus may be removed man obvious manner and transported in entirety or in a use, as will be readily understood.

From the foregoing description, taken in conn'ectionwith the drawings, the construc tion, mode of operation and advantages of my improved drilling apparatus will be readily understood, and it will be seen that simplicity is secured by providing the drill i with a .combined cutting andthreaded surface, enabling the operating parts coacting 7 therewith to be reducedto the minimum.

- A drilling apparatus comprising a yoke having bearing openingsin its side arms, a

jthreaded bearing member having trunnions at lts ends 1ournaled in said bearing opena In testimony whereof I.

'ings', and provided atone of its ends with a knuckle and at its opposite end with a transversely disposed projecting lug, a sec- 0nd threaded bearing member provided at one end with spaced ears receivlngsaid knuckle and pivotally connect'edthereto and form to provide a circular passage, a wedge key engaging the slotted lug to hold said bearing members assembled, a drill extending through the passageformed by the bearing members, and having a continuous spiral surface provided with threads to engage'the thread surfaces of said bea'ringjmembers, means for rotating sald drill, a proJect1o11 from the cross portion of the yoke, and an anchor bar'pi voted'to said projectionand provided with a pointed free end.

affix my signature inpresence of two witnesses. I

"Witnesses: a I E: M. HUME,

GEORGE HUME.

i Gop iesof this patent may be obtained forifive cents each, by addressing the Commissionerfof Iatents,

: i washingtomnfl. i

GEORGE o; wiLT'HEw. 

